An idea that spreads is a meme. But what about an idea that carries the machinery for its own understanding? Today, we examine the ultimate meme: a World Model packet. A self-contained slice of a trained model's understanding—not just the conclusion, but the causal framework that led to it. This isn't sharing a fact; it's sharing a lens. And it will make ideas spread like a virus with a brain.Imagine a research team trains a World Model to understand a novel quantum phenomenon. Today, they publish a paper—a description. Tomorrow, they could publish a model snippet: a compact set of weights and architecture that encapsulates the 'aha' moment. Another scientist doesn't just read about it; they load the snippet into their own model. They now see the problem through the discoverer's AI-augmented intuition. Understanding is transmitted, not described.This makes insight contagious. Breakthroughs in material science, medical research, or economic theory could propagate through the global research community not in years, but in days, as model-snippets are shared and integrated. The bottleneck shifts from human comprehension to model compatibility.But this is also a vector for cognitive pandemics. A malicious, brilliant idea—a flaw in logic that seems profoundly true, or a persuasive political ideology optimized by an AI—could be packaged as a World Model snippet. It wouldn't just convince you; it would reconfigure your analytical tools to favour it. It would be an idea that comes with its own reality-distortion field, making counter-arguments seem stupid within its own logical frame. This is mind-hacking at the structural level.Cultural evolution will accelerate beyond recognition. Fads, philosophies, and scientific paradigms will rise and fall at the speed of software updates. The unit of cultural transmission will no longer be the book, the song, or the video. It will be the .worldmodel file—a seed of understanding that blossoms into a whole new way of seeing inside the recipient's mind.My controversial take is this: The advent of transmissible World Model snippets marks the end of individual intellectual sovereignty. Our perspectives will become a patchwork of imported, pre-fabricated understandings. We will think with borrowed brains. The most critical skill will not be creativity, but immunology—the ability to audit and firewall incoming model-packets, to maintain a 'self' against the tide of contagious thought. We will have to choose which foreign intelligences we allow to colonize our own."This has been The World Model Podcast. We don't just share ideas—we engineer the very medium of thought itself. Subscribe now.